kelley, has now been cleared of wrongdoing. the e-mails were discovered as part of the investigation into the extramarital affair of cia director david petraeus. so, a lot of news, diane. >> so, that's over for him then? >> reporter: that is. >> all right, thank you, martha raddatz. >>> and in houston today, there was a terrifying scene at the lone star college campus. two people with guns shooting at each other after a dispute. and two other people caught in the cross fire. one gunman also injured. you can also see some of the victims rushing out on gurneys, being carried out. and our affiliate ktrk reported that students heard five to six shots. two people have been taken into custody, one student tweeted out this picture, students huddled in a classroom after the shots were fired. >>> and there's a big headline tonight about modern health. 43 million people are taking some kind of aspirin every day to prevent heart attacks and strokes. but now, the leading medical journal, "jama," says there is evidence that daily aspirin co